磁悬浮飞轮锁紧保护效果的检测

Detection of locking protection effect for magnetic bearing flywheel

综合考虑磁悬浮飞轮系统及其现有锁紧机构的各项性能,提出了一套检验飞轮锁紧机构保护效果的方法。以可重复抱式锁紧机构为例,从飞轮系统性能、宏观振动响应和微观损伤三方面对锁紧机构的保护效果进行了评测。通过对比分析磁悬浮飞轮和锁紧机构在环境力学试验前后的性能测试数据,判断两者性能是否正常。环境力学试验中,利用加速度力学传感器和电涡流位移传感器分别检测飞轮系统频谱响应和飞轮定、转子间的相对振动位移,评价锁紧机构的宏观保护效果。力学试验后,采用扫描电子显微镜(SEM)和能量色散谱仪(EDS)分析锁紧面内的磨损形貌和元素成分,对锁紧机构的微观保护效果进行评价。该检测方法对同类航天产品的检测具有很好的借鉴意义。

A novel testing method for the protection effect of locking device on a magnetic bearing flywheel was proposed by consideration of the performance of existing locking devices and magnetic bearing flywheels.By taking a repeated clamping locking device as an example,its protection effect for magnetic bearing flywheels was evaluated from the performance of magnetic bearing flywheel,vibration macroscopic response and microscopic wear.With comparative analysis on the performance data of the magnetic bearing flywheel and the locking device before and after environmental mechanics tests,they could run normally or not were judged.In the mechanics tests,an acceleration mechanics sensor and an eddy current displacement sensor were respectively used for measuring online response spectra of flywheel system and the vibration displacement between stator and rotor,and for evaluating the macroscopic protection function of the locking device for the flywheel.After mechanics tests,a Scanning Electron Microscopy （SEM） and an Energy Dispersive Spectroscopy （EDS） were applied to analyzing the wear morphology and the spectra of locking surface,and the microscopic protection function was obtained.This testing method provides important significance for detecting of similar aerospace products.